The Rio Grande Herald (Rio Grande City, Tex.), Vol. 79, No. 21, Ed. 1 Thursday, April 6, 1989, newspaper, April 6, 1989; (https://texashistory.unt.edu/ark:/67531/metapth195179/m1/1/: accessed May 7, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .